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Message-Id: <1268630108-10374-2-git-send-email-cooldavid@cooldavid.org>
Date: Mon, 15 Mar 2010 13:15:07 +0800
From: cooldavid@...ldavid.org
To: "David Miller" <davem@...emloft.net>
Cc: Guo-Fu Tseng <cooldavid@...ldavid.org>,
"linux-netdev" <netdev@...r.kernel.org>,
"Ethan Hsiao" <ethanhsiao@...cron.com>
Subject: [PATCH net-2.6 2/3] jme: Adding lock to protect vlgrp structure.
From: Guo-Fu Tseng <cooldavid@...ldavid.org>
Adding a lock to prevent modifying the vlgrp structure while receiving
VLAN packet.
Signed-off-by: Guo-Fu Tseng <cooldavid@...ldavid.org>
---
drivers/net/jme.c | 6 ++++++
drivers/net/jme.h | 1 +
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/net/jme.c b/drivers/net/jme.c
index cfc7b98..9096bbd 100644
--- a/drivers/net/jme.c
+++ b/drivers/net/jme.c
@@ -942,11 +942,14 @@ jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
skb->ip_summed = CHECKSUM_NONE;
if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
+ spin_lock(&jme->vlgrp_lock);
if (jme->vlgrp) {
jme->jme_vlan_rx(skb, jme->vlgrp,
le16_to_cpu(rxdesc->descwb.vlan));
+ spin_unlock(&jme->vlgrp_lock);
NET_STAT(jme).rx_bytes += 4;
} else {
+ spin_unlock(&jme->vlgrp_lock);
dev_kfree_skb(skb);
}
} else {
@@ -2088,7 +2091,9 @@ jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
{
struct jme_adapter *jme = netdev_priv(netdev);
+ spin_lock_bh(&jme->vlgrp_lock);
jme->vlgrp = grp;
+ spin_unlock_bh(&jme->vlgrp_lock);
}
static void
@@ -2755,6 +2760,7 @@ jme_init_one(struct pci_dev *pdev,
spin_lock_init(&jme->phy_lock);
spin_lock_init(&jme->macaddr_lock);
spin_lock_init(&jme->rxmcs_lock);
+ spin_lock_init(&jme->vlgrp_lock);
atomic_set(&jme->link_changing, 1);
atomic_set(&jme->rx_cleaning, 1);
diff --git a/drivers/net/jme.h b/drivers/net/jme.h
index c19db91..0ed4924 100644
--- a/drivers/net/jme.h
+++ b/drivers/net/jme.h
@@ -393,6 +393,7 @@ struct jme_adapter {
spinlock_t phy_lock;
spinlock_t macaddr_lock;
spinlock_t rxmcs_lock;
+ spinlock_t vlgrp_lock;
struct tasklet_struct rxempty_task;
struct tasklet_struct rxclean_task;
struct tasklet_struct txclean_task;
--
1.6.4.4
--
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